.center_photo{
    width: 60%;
    margin: 0 20%;
    height: 600px;
    border: 1px solid #333333;
    background: #eeeeee;
}
.center_photo img{
    width: 100%;
    height: 100%;
}
#scroll_number{
    height: 50px;
    position: relative;
    top: -60px;
    width: 240px;
    margin: 0 auto;
    left: 0px;
    z-index: 9999;
    text-align: center;
}
#scroll_number ul li{
    width: 20px;
    height: 20px;
    margin: 0 5px;
    float: left;
    list-style: none;
}
#scroll_number ul li img{
    width: 20px;
    height: 20px;
}
#scroll_number ul li img:hover{
    cursor: pointer;
}